gpu: nova-core: bitfield: simplify condition

This condition was uselessly convoluted.

Reported-by: Edwin Peer <epeer@nvidia.com>
Link: https://lore.kernel.org/rust-for-linux/F3853912-2C1C-4F9B-89B0-3168689F35B3@nvidia.com/
Reviewed-by: Joel Fernandes <joelagnelf@nvidia.com>
Reviewed-by: Danilo Krummrich <dakr@kernel.org>
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Message-ID: <20251022-nova-bitfield-v1-1-73bc0988667b@nvidia.com>

drivers/gpu/nova-core/bitfield.rs

@@ -203,7 +203,7 @@ macro_rules! bitfield {
     ) => {
         bitfield!(
             @leaf_accessor $vis $name $storage, $hi:$lo $field
-            { |f| <$into_type>::from(if f != 0 { true } else { false }) }
+            { |f| <$into_type>::from(f != 0) }
             bool $into_type => $into_type $(, $comment)?;
         );
     };